WOLLASTONITE  , a See also:

• ROCK
• ROCK (O.Fr. rake, Sp. rota, Ital. rocca; possibly from a Lat. form rupica, from rupes, rock)
• ROCK, DANIEL (1799–187t)

rock-forming See also:

• MINERAL

mineral consisting of See also:

• CALCIUM [symbol Ca, atomic weight 40.0 (o= x6)]

calcium metasilicate, CaSiO3, crystallizing in the See also:

• MONOCLINIC

monoclinic See also:

• SYSTEM

system and belonging to the See also:

• PYROXENE

pyroxene (q.v.) See also:

• GROUP

group . It differs, however, from other members of this group in having cleavages, not parallel to the See also:

• PRISM (Gr. rrpivµa, properly a thing sawn, Irpii"ety, to saw)

prism-faces, but in two directions perpendicular to the See also:

• PLANE

plane of symmetry . Crystals are usually elongated parallel to the See also:

• AXIS (Lat. for " axle ")

axis of symmetry and flattened parallel to the ortho-pinacoid, hence the See also:

• EARLY
• EARLY, JUBAL ANDERSON (1816-1894)

early name " See also:

• TABULAR

tabular spar "; the name wollastonite is after W . H . See also:

• WOLLASTON, WILLIAM (1659--1724)
• WOLLASTON, WILLIAM HYDE (1766-1828)

Wollaston . The mineral usually occurs in See also:

• WHITE
• WHITE, ANDREW DICKSON (1832– )
• WHITE, GILBERT (1720–1793)
• WHITE, HENRY KIRKE (1785-1806)
• WHITE, HUGH LAWSON (1773-1840)
• WHITE, JOSEPH BLANCO (1775-1841)
• WHITE, RICHARD GRANT (1822-1885)
• WHITE, ROBERT (1645-1704)
• WHITE, SIR GEORGE STUART (1835– )
• WHITE, SIR THOMAS (1492-1567)
• WHITE, SIR WILLIAM ARTHUR (1824--1891)
• WHITE, SIR WILLIAM HENRY (1845– )
• WHITE, THOMAS (1628-1698)
• WHITE, THOMAS (c. 1550-1624)

white cleavage masses . The hardness is 5, and the specific gravity 2.85 . It is a characteristic product of contact-See also:

• METAMORPHISM (Gr. ise-rci, change of, and liop¢i, shape)

metamorphism, occurring especially, with See also:

• GARNET
• GARNET, or GARNETT, HENRY (1555—1606)

garnet, See also:

• DIOPSIDE

diopside, &c., in crystalline limestones . Crystals are found in the cavities of the ejected See also:

• LIMESTONE

limestone blocks of See also:

• MONTE

Monte Somma, See also:

• VESUVIUS (also Vesevus in ancient poets)

Vesuvius . At See also:

• SANTA

Santa Fe in the See also:

• STATE
• STATE, GREAT OFFICERS OF

State of See also:

• CHIAPAS

Chiapas, See also:

• MEXICO
• MEXICO (Span. Mejico, or Mexico,)
• MEXICO, FEDERAL DISTRICT OF
• MEXICO, GULF OF

Mexico, a large rock-See also:

• MASS (O.E. maesse; Fr. messe; Ger. Messe; Ital. messa; from eccl. Lat. missa)
• MASS, IN

mass of wollastonite carries ores of See also:

• GOLD
• GOLD [symbol Au, atomic weight 195.7(H = 1),197.2(0 =16)]

gold and See also:

• COPPER (symbol Cu, atomic weight 63.1, H=1, or 63.6, O = 16)

copper: here are found large See also:

• PINK

pink crystals which are often partially or wholly altered to See also:

• OPAL

opal . (L . J .